Wok/Mk ll
Dow
SECTION 4.3 Summary
1: rt'andomfvariable is a variable taking numerical values determined by the
u cobrlne o a random phenomenon. The probability distribution of a random
varla e X tells us what the possible values of X are and how probabili
1
Homework Problem from Section 1.3
2
Lecture 2.1/2.2
Scatterplots and Correlation
September 16, 2013
Associated
Two variables are associated if knowing something about one
gives you information about the other. Examples:
Lack of sleep and stress
Size of
Lecture 5.1
The Sampling Distribution of a
Sample mean
October 14, 2013
HW Problems Due Today
2
HW Problems Due Today
3
Texting While Driving
Texting
while driving can be dangerous, but 26% of all teen
drivers text while driving. If we take a sample of 50
1
Lecture 4.1/4.2
Probability Models
October 2, 2013
Sample Space
Consider a simple coin. The coin is considered fair if the
probability of getting either a heads or a tails is 0.50 or 50%.
A sample space S of a random phenomena is the set of all
possible
Lecture 4.3/4.4
Random Variables, Means, and
Variances
October 9, 2013
HW Problems Due Today
2
Texting While Driving
Texting while driving can be dangerous, but 26% of all teen
drivers text while driving. If we take a sample of 500 teen
drivers, what perc
1
Lecture 4.2/4.3
Probability Models and Random
Variables
October 7, 2013
Independence and Multiplication Rule
Suppose you toss a coin twice. Consider the two events:
A = cfw_first toss is a head
B = cfw_second toss is a head
Are they disjoint?
Notice tha
1
Lecture 1.3
Density Curves and Normal
Distributions
September 11, 2013
Density Curves
You can think of Density Curves as smooth approximations of
histograms:
3
Density Curves
*Question: what is the area
under the density curve to
the left of the median?
1
Lecture 2.3
Least-Squares Regression
September 18, 2013
Regression Line
3
Does Fidgeting Cause Decrease in
Fat Gain?
4
Fitting the Data to a Line
5
Use Regression Line to Predict
Response Values
6
Does your answer make sense?
7
How do you choose the lin
1.1 Displaying Distributions with
Graphs
September 4, 2013
Lying with Statistics
http:/
zenoferox.blogspot.com/2010/07/believing-your-ly
ing-eyes.html
2
Lying with Statistics
http:/www.physics.csbsju.edu/stats/display.html
3
Lying with Statistics
http:/ww
1
Lecture 1.2
Describing Distributions with
Numbers
September 9, 2013
The Mean
ADD THIS TO YOUR FORMULA SHEET!
3
Find the Median
Now find the quartiles!
The Five Number Summary consists of:
- Median
- Maximum
- Minimum
- Q1
- Q3
4
In Interquartile Range
D
EXAM II
Review Notes
Please note, In this document, I am including broad and narrow subsections of each
chapter that I recommend you prepare for exam II on 10/27.
Chapter 6: Socioemotional Development in Infancy
Section 1: Emotional and Personality Develo